Phonograph start-stop switch



May 15, 1951 H. J. ADLER ETAL 2,552,757

' PHoNoGRAPH START-STOP SWITCH Filed May 2, 1946 :5 sheets-sheet 1 wnugmMay 15, 1951 H. J. ADLER ETAL 2,552,757

PHONOGRAPH START-STOP SWITCH Filed May 2, 1946 i 3 Sheets-Sheet 2 Mayl5, 1951 Filed may 2, 194e H. J. ADLER rs1-Ax. 2,552,757

PHONDGRAPH START-STOP SWITCH 3 Shee'cs--Sheet 3 Patented May 15, 1951Park Ridge, Ill., assignors to ASentinel Radio Corporation, Evanston,Ill., a corporation of `Illinois ApplicationlMay 2, 1946, Serial No.666,675

1 Claim. 1

This `invention relates 'in general to phonographs, and more,particularly .to a combination radio and phonograph, .embodying aVpickup arm which carries a stylus or needle that contacts and travelsover the record.

I-Ieretoiore, indevices of this character, which are usually housedwithin a cabinet containing a lid, which latter is generally closedduring the playing of a record, when it is desired to change the record,the lid is raised and the .operator then moves the .pickup oristyluscarrying arm out of engagement with the record, and out of the way, topermit the `placing of a record on the revolving table. The pickup armand stylus are then placed in position by the operator with respect tothe record, and the control switch operated to start the table drivingmotor.

It is one of the objects of the present invention to provide, in adevice of this character, means whereby all operations .normallyperformed by the operator, .except the opening of the `cabinet and theplacing of the record on the turn-table, will be eliminated.

.Another object is to provide improved means whereby, when the cabinetis opened, that is, the lid raised, the pickup arm will be automaticallyshifted to move the stylus out of engagement with the record, and out ofthe way, so as not to interfere with the 'reversing of the record, orwith its record.

A further object is to provide improved means whereby the mechanism mayb'eireadilyadjus'ted to compensate diiferent sizes -of records.

A further object is to provide improved means whereby, when the pickuporstylus carrying arm has reached a predetermined iposition with respectto the record, the turn-table `operating -motor will .be stopped.

Aiurther object is to provide improved means whereby, when the lid orclosure for the case or cabinet is opened, the stylus carrying arm willbe automatically and correctly positioned for starting in the rst grooveof the record, when the lid or closure is lowered or moved into closingposition.

A still further object is to provide improved means for controlling themotor, and improved means for cutting off the motor when the stylusreaches the end of the record, which means automatically resets itselfwhen the lid is closed.

To the attainment of these ends, and the accomplishment of other new anduseful objects as will appear, the invention consists in the features ofnovelty in substantially the construction, comremoval .and thesubstitution of another bination and arrangement of the several parts,hereinafter more fully described and claimed, and shown in theaccompanying drawings eX- emplifying `this invention, in which Fig. l isa perspective view of an apparatus of `this character, constructed inaccordance with the principles of 'this invention, and with the lid orclosure in an open position.

Fig. 2 is a horizontal 4sectional View taken on .line 2-2, Fig. 3.

Fig. 3 is a verticalsectionalview taken on line 3 3., Fig. 2.

Fig. 4 is a diagrammatic view of the pickup or stylus carrying arm, andone form of control switch for the table actuating motor.

Fig. 5 is a schematic view of the 'pickup arm, the control mechanisms,and a wiring diagram.

Referring more particularly to the drawings, the numeral it designates acase'or housing, having a lid or closure ll connected thereto bysuitable hinges l2., the lid being hollow. Within the C ase is a motorI3, for rotating the record carrying turn-table if in `any well-knownmanner, such-asby means of a worm I5, engaging a worm gear i6 which isconnected to the turn-table.

The lid `I i maybe supported in its open position inany suitable manner,such as by means of links Il lt pivotally connected, as at iii, the freeends of the links being, respectively, pivotally connected to the lid,and to a suitable support 29., co-operating shoulders 2l being providedon the links to limit .the opening movement of the lid. Within `the lidi i, and pivotally mounted .adjacent one of its ends, as at 22, is a,pickup or .stylus carrying arm `23, which may be of any suitableconstruction and configuration, and

which kcarries a stylus or needle 2d at its other end. This arm ismounted to swing on anlaxis ,perpendicular to the lid, and a stop .25may be provided for limiting the movement of the arm .aboutits pivot .inone direction.

.Adj-ustably .mounted within the .lid I| preferably by means of screwsand slots 28, 21, is a member or bar 28, the ends of which are deiiectedat right angles to the body portion, as at 29, 30. The screws and slots255, 2l are so arranged as to serve as stops for limiting the movementof the member 28, and for selectively positioning the end 3G of themember, to be engaged by the arm 23, according to the size or diameterof the record to be played.

By moving the member 28 to the left, in Figs. 1 and 2, until one end ofthe slots engages the screws, the end 3i) will be positioned to beengaged by the arm 23, to position the stylus 24 to rying arm 44.

play, say, a l-inch record. By moving the member 28 to the right, insaid figures, until the other end Yof the slots 21 engages therespective screws 26, the arm will fall into engagement with the end 379of the member 28, and will position the stylus or needle 24 so as toplay a 12- inch record. The movement of the arm 23 about its pivot toposition the stylus 24., at the begin ning of the record, is eifected bygravity as the lid Il is being raised, as during that time the arm willfall into engagementwith the end 39 of the member 28, in either of thepositions to which the end or stop 36 has been moved.

To operate this mechanism, the selector member 28 is first adjusted toposition the end 30 thereof, according to the size of the record to beplayed. The arm 23 is free to swing by gravity about its pivot 22, andinto contact with the end 36, when the lid Il is raised. When the lid isclosed, the stylus or needle 24 will then be in the proper position tostart on the record.

The motor i3 is included in a circuit embody- Ying conductors 3l-32, andalso included in the projected to a position so that when the lid isclosed, the contact 34 will engage the contact 33, to close the circuit,and will yield to permit of Y such action, as well as hold the contact34 in engagement with the Contact 33.

The arm 23 is electrically connected with the amplifier or cone speaker36, in any suitable manner.V The usual radio equipment (not shown)common in devices of this character, is also employed, and a switchdevice 31, suitably located for manual operation, makes it possible toselectively render the Vapparatus operable as a radio or phonograph. Aradio dial 38, and control buttons or knobs 39, 46 are also provided andsuitably located.

In the form of the invention shown in Figs. 4 and 5, a switch ormake andbreak device is included in the conductor 3|, and preferably embodiestwo contact members 4l-42, one of which is preferably resilient, and ismovable into and out of engagement with the co-operat'ing contact,

Vto make and break the motor circuit to start and stop the revolvingrecord supporting table I4.

The contact 4i is preferably longer than the contact 42, so that aportion of the former will extend into the path of movement of anextension or projection 43 on the needle or stylus car- This contact 4lis so positioned that the extension 43 on the arm will engage and shiftit out of engagement with the contact 42. just as the stylus or needlereaches the end of the record being played.

Whenthe lid or cover i I is raised to change the record, the arm 44 willautomatically swing by gravity to position the stylus to begin anotherrecord, and, at the same time, the extension 43 will move to a positionwith respect to the contact 4l, to permit the latter to engage thecontact 42, and thereby close the motor circuit.

With this invention, it will be manifest that the stylus carrying armwill be automatically set to a starting position upon the raisingof thelid, and all operations usually performed by the operator, with theexception of opening the lid, and the placing or removal of the records,will be dispensed with. Furthermore, means are provided for selectivelysetting the stylus in accordance with 'the size or diameter of therecord to 'Y be played. The apparatus is also adapted to be selectivelyset to perform as a phonograph, or as a radio, by the manipulation of asingle control switch.

While the preferred forms of the invention have been herein shown anddescribed, it is to be understood that various changes may be made inthe construction, and in the combination and arrangement of the severalparts, within the scope of the claim, without departing from the spiritof this invention.

What is claimed as new is: Y

A phonograph apparatus embodying a, housing, a closure hingedly mountedon said housing, an electric motor, a record supporting table adapted toberotated by said motor, a stylus carrying arm pivotally mounted uponthe closure, a rst switch having two normally closed contact members,one of which is longer than the other, an extension on said stylus armfor engaging the longer of said contact members to open said switch whenthe stylus has traversed a record Yon said record supporting table, anda second switch including a first contact member mounted on the closureand a second contact member mounted on the housing, whereby said secondswtchis opened when said closure is raised, and is closed when saidclosure is lowered to closing position, said nrst switch and said second'switch being electrically connected in series with said motor wherebyopening of either switch will de-energize said motor whereupon rotationof said record supporting table will cease.

HAROLD J. ADLER. MATTHEW Z. MROZ.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Date Krause Oct. 22, 1940

